Clamp for clamping concrete forms



Sept. 16, 1952 A. H. JENNlNGs ETAL. 2,610,660

CLAMP FOR CLAMPING CONCRETE FRUS Filed Aug. 51950 2 srmz'rs-srms'r 1 INVEN'roRs ATroHNEYs.

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Sept. 16, 1952 A. H. JENNINGs Erm.

CLAMP FOR CLAMFING CONCRETE FORMS 2l SllEETS-SHEET 2 Filed Aug. 5. 1950 Patented Sept. 16,; 1952 y,Albion H.r Jenning'sfand Herbert E. Sherman,y s l Miami,A Fla.; ,said Jennings assignorwtosaid v Sherman Applicatin'aust 3,1950,seraiNainAss. lf

This invention relates to concrete forms and more particularly to the clamps which are used in clamping together the forms or form boards used in the construction of concrete walls, beams, n

lintels or the like. i

An important object of the invention is to provide a clamp of this type which may be readily and easily operated to clamp the forms orfform boards, the clamp securely holding the forms yor form boards spaced apart during the' 'setting of the concrete or plastic material used withthe forms. 4

Another object of theinvention is to provide a clamp used in clamping concrete forms or boards, which clamps are adjustable so that they may be eectively usedinfthe -construction` or" walls, beams or lintels ofv various widths 'and sizes. A

With the foregoing and'otherfobjects in view which will appear as the description proceeds, the invention consists of certain novel details of construction and combinations of parts hereinafter more fully described andpointed out 1in the claim, it being understood that changes may be made in the construction and arrangement of parts Without departing from the spirit` of the invention as claimed.

Referring to the drawings:

Figure l is a vertical sectional view through the upper portion of a section of a concrete wail and form boards, the clamp forming the subject matter of the present invention being shown in elevation. c

Fig. 2 is a fragmental elevational view of the clamp.

Fig. 3 is a fragmental end elevational view of the clamp, the clamp being shown in its open position.

Fig. 4 is a perspective view of the lever bar of the clamp.

Fig. 5 is a perspective view of one arm of the linkage used in connecting the operating lever to the upper bar of the clamp and one of the side bars of the clamp.

Fig. 6 is a perspective view of the pivoted link connected between the lever and upper section of the clamp.

Fig. 7 is an end elevational view of a modified form of the invention.

Fig. 8 is a disassembled view illustrating the levers that connect with one o1 the clamping side members of the modified form of clamp.

Fig. 9 is a fragmental elevational view illustrating the movable section of the clamp as in its open position.

1 claim. (o1. 144-291) .z, Fig. 10` is a sectional view taken on line 4Ill-#It 0f Fig. 7. f y

l s Referring tothe drawings in detail,y the reference character 5 indicates the upper portion of asection of wall under construction and to which the mold form boards andfclamp, forming the subject matter of the present invention, tare secured in the formation of another course oi a wall.

y The reference character 6 indicatesv form boards, which may be of any desired length, the

boards being positionedagainst thevs'ides'of the .wall Section5 adjacent to the upper edge thereof,

asfshown by Fig. 1 of the drawings. The clamp forming the'subject matter of the present invention comprises a stationary leg i' anda horizontal'bari .welded tothe upper end of theleg ll', the bar 8 being rpreferably ofY angle bar construe",-v

., Secured to the horizontalr bar 8, and depending therefrom, arer adjustable stops 9 and I IJ, the lstop 9 being spaced from the inneredge of,l theleg 'I' to contact. with the form board 6 associated therewith, the clampv 8 rbeing moved to'closely engage the form board 6. The stopIG which is also adjustable, is carried by the bar 8 adjacent to the opposite end of the bar 8, where it cooperates with the movable leg I I of the clamp, in clamping the form board I2 associated therewith.

The reference character I3 indicates a lever of bell-crank construction, which lever is pivotally connected with the horizontal bar 8, at one of the openings I4 thereof by means of pivot pin I4. The wing nut` I 5' is positioned on the bolt I2 and aiolds means for readily securing the bolt in its adjusted positions lwithin an opening of the bar 8. Pivotally connected to one arm of the bell-crank lever I3 at I6, is the operating or control lever I5. The control lever I5 is also pivotally connected to the movable leg II at I1, to the end that as the lever I 5 moves downwardly from the position shown by Fig. 3 of the drawings to the position shown by Fig. l of the drawings, the movable leg II will bev moved into clamping relation with the form board I2, and as the pivot point I6 moves past dead center with. respect to the pins I6 and I4', the movable leg II will be held against the form board I2 and since the stop I 8 carried by the control lever I5 engages one edge of the movable leg II, further movement of the leg I i will be prevented.

The operating or control lever is also provided with an upstanding section Iii', providing a handie by means of which the lever may be operated.

It is obvious that when the lever I has been moved to the position shown by Fig. 1 of the drawings, a stop in the form of the bar I 9 is positioned on the lever I5 engaging between the upstanding section I8 of the lever and movable leg II, thereby holding the lever against accidental displacement. Itmight be stated that in the use of this device, a pair of these clamping members may be provided for holding or supporting form boards, in which case the operating or control levers I5 of the clamping sections may be connected by the upstanding sections I8' and bar 20, connecting the upstanding sections I8'.

When the clamp has been properly operated to support the form boards, the concrete material may be poured therebetween and allowed to set, after which the form boards may be removed from the finished wall.

In the form of the invention as shown by Fig. 7, the clamp comprises the stationary clamp leg 2I to the upper end of which is secured the supporting bar 22 formed with a plurality .of spaced openings 23 to receive the pivot pin 24 used in connecting the pivoted leg 25 of the clamp to the supporting bar 22; By moving the pin 24, it is obvious that the width of the clamp may be varied to meet various requirements.

The pivoted leg 25 is formed with an offset portion 26 which is designed for positioning over a ratter which may be in place whereV the lintel is to be poured.

In this form of the invention clamps 21 are used as stops against which the leg sections of the clamp engage, restricting movement thereof in one direction.

The-reference character 28 indicates a link pivotally connected to the pivoted leg 25, by means of the pivot pin 29, the link 28 being pivot ally connected with the lever 30, by means of the pivot pin 3l. The lever 80 is also pivotally connected with the supporting bar 22 by the pivot pin 32.

With this form of the invention it is obvious that when the lever 30 is moved beyond the posi tion shown by Fig. 9 of the drawings, to the position shown by Fig. '1 of the drawings, the pivoted 4 leg 25 or the clamp will be moved to its clamping position against form boards, to hold the form while concrete is being poured thereinto.

From the yforegoing it will be seen that due to the construction shown and described, we have provided a clamp for clamping form boards in the construction of concrete beams, walls or lintels, the clamp being such that it will support the form boards thereof over their entire widths, the form boards and clamp being readily removable for dismantling the form, when it is desired. It will also be seen that the form boards may be readily supported in the formation of a mold, the clamps acting to hold the form boards upright.

Having thus described the invention, what is claimed is:

A form clamp for concrete work, comprising a stationary leg, a horizontal bar secured at one of its ends, to the upper end of said stationary leg, stops mounted on the horizontal bar extending below said bar. said stops being adjustable longitudinally of said bar for engaging the form boards, a movable leg, means for pivotally connectlng the movable leg to said horizontal bar, a bell-crank lever pivotally connected with the horizontal bar through a bolt passing through the bell-crank lever and horizontal bar, a control lever pivotally connecting the bell-crank lever to the movable leg, and means for limiting movement of the control lever and bell-crank lever in one direction.

ALBION H. JENNINGS.

HERBERT E. SHARMAN.

REFERENCES CITED AThe following references are of record in the l'e of this patent:

UNITED STATES PATENTS Number Name Date 1,020,164 Symons Mar. l2, 1912 1,501,212 Fronsoe et al. July 15, 1924 1,606,892 Newton Nov. 16, 1926 1,619,749 Murray Mar. 1, 1927 2,452,325 Rosser Oct. 26, 1948 2,538,526 Kittas Jan. 16, 1951 

